Bug#239341: xdm: unknown purpose tcp port open

[ROBERTOJIMENOCA]

Package: xdm
Version: 4.3.0-7
Severity: normal

I have this port open (that wasn't open in xdm 4.2.x)
tcp        0      0 0.0.0.0:33016           0.0.0.0:* LISTEN     2179/xdm
and I don't know what the purpose of that is.
It seems like a bug or a Trojan in the binary (or source).